A weightlifter curls a 30 kg bar, raising it each time a distance of 0.60 m. How many times must he repeat this exercise to burn off the energy in one slice of pizza?

Q: The Kingda Ka roller coaster at Six Flags Great Adventure and Safari in New Jersey currently holds…

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Q: A medium-sized apple provides about 95.0 Calories of energy.

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Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

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Q: When water flows through river rapids or over a waterfall, it experiences a decrease in height and…

A: Basic Details The gravitational potential energy of the water depends on the height of the…

Q: A weightlifter curls a 28 kg bar, raising it each time a distance of 0.55 m.  How many times must…

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Q: In the figure, a 1.4 g ice flake is released from the edge of a hemispherical bowl whose radius r is…

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Q: Consider four identical cars. Two of them collide head-on when both are traveling at 34 m/s . The…

A: v1=34m/s v2=27m/s We need to find The ratio of the amount of kinetic energy converted to internal…

Q: A 3.0 × 10-3 kg copper penny drops a distance of 50.0 m to the ground. If 65 percent of the initial…

A: Given data: Mass, m = 3.0 × 10-3 kg Height, h = 50m   Solution: The equation of the potential energy…

Q: Problem 12:  When water flows through river rapids or over a waterfall, it experiences a decrease in…

A: Height of waterfall (h) = 41 m  Specific heat of water (c) = 4.19 × 103 J / kg ° C

Q: A bullet fired into a trunk of a tree loses 1/4 of its kinetic energy in traveling a distance of 5…

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Q: A student evaluates a weight loss program by calculating the number of times he would need to dlimb…

A: Given: Total height , h=16.0 m Weight fat lose , m=0.45 kg 1 kg of fat can produce chemical 3.77×107…

Q: A 50-g ball is released from rest 40 m above the surface of the Earth. During the fall the total…

A: Given: The mass of the ball is m=50 g, The height of the ball above the surface of the Earth is…

Q: In the figure, a 2.2 g ice flake is released from the edge of a hemispherical bowl whose radius r is…

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Q: A weightlifter curls a 35 kg bar, raising it each time a distance of 0.60 m. How many times must he…

A: A slice of pizza contains 1260 J. A fraction of this energy can be used as work and the remaining is…

Q: In the figure, a 2.8 g ice flake is released from the edge of a hemispherical bowl whose radius r is…

A: Given Mass of ice flake ,m=2.8 g=2.8×10-3 kgRadius of hemispherical bowl, r=21 cm=0.21 m

Q: When you put on the brakes on your bicycle, friction heats the steel rims of your wheels. Could this…

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Q: At 11:00 AM on September 7, 2001, more than one million British school children jumped up and down…

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Q: In the figure, a 2.6 g ice flake is released from the edge of a hemispherical bowl whose radius r is…

A: Given:Mass of the ice flake, m =  1.6 g = 0.0016 kgRadius of the bowl, r = 16 cm = 0.16 m

Q: A weightlifter curls a 26 kg bar, raising it each time a distance of 0.65 m . How many times must he…

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Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

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Q: An egg is released from rest from the roof of a building and falls to the ground. Its fall is…

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Q: Suppose that the breakfast of a typical 65 kg adult gives him 1.85 x 105 J of energy. How long does…

A: Given: The mass of the adult m = 65 kg The energy had in breakfast E = 1.85 x 105 J The acceleration…

Q: A student spends part of his day walking between classes, during which time he expends energy at an…

A: Power and Energy relationship: Mathematically, Power= WorkTime  i.e in simple terms, Power is rate…

Q: The food calorie, equal to 4186 J, is a measure of how much energy is released when food is…

A: (a) The change in gravitational potential energy of the person is obtained as; ΔU=mgΔym is the mass…

Q: Problem 4: Energy that is not utilized for work or heat transfer in the human body is converted to…

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Q: Ball shot into sand. A steel ball with mass m = 5.2 g is fired vertically downward from a height h,…

A: Given data: The mass, m =5.2 g=0.0052 kg The height h1=18 m The initial speed is v0=14 m/s The…

Q: A woman fires a rifle with barrel length of 0.5400 m. Let (o, 0) be where the 75 g bullet begins to…

A: a) The work done by the gas on the bullet can be found as, Here, F and L represent the force…

Q: A woman fires a rifle with barrel length of 0.5800 m. Let (0, 0) be where the 125 g bullet begins to…

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Q: The food calorie, equal to 4186 J, is a measure of how much energy is released when the body…

A: Given: The food calorie is given as 4186 J. The fruit and cereal bar contains 140 calories. The mass…

Q: Assume that the energy content in food can be converted to mechanical energy with 100% efficiency.…

A: Write the given values with the suitable variables. E=330 kcal=330×4184 J=1380720 Jh=8850 mm=127 kg…

Q: length expanding gas on the bullet is (17,000 + 10,000x - 26,000x2) N, where x is in meters. (a)…

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